Preheat your oven to 180°C (350°F) and lightly grease a medium-sized baking dish with a little olive oil or cooking spray so nothing sticks and cleanup stays easy.

Take the chicken breasts and slice them evenly into thinner fillets—this helps them cook faster and more evenly. Season both sides with salt, black pepper, oregano, and basil, gently rubbing the seasoning in so every bite is flavorful.

Heat the olive oil in a skillet over medium heat. Once hot, place the chicken pieces in a single layer and sear for about 2–3 minutes on each side until lightly golden. You’re not cooking them fully here—just locking in juices and building flavor—so avoid overcooking at this stage.

In a mixing bowl, combine the Greek yogurt, minced garlic, and grated parmesan cheese. Stir well until the mixture becomes smooth, creamy, and evenly blended. This will act as your high-protein creamy layer, so make sure there are no lumps.

Spread a thin, even layer of marinara sauce across the bottom of the prepared baking dish. This prevents sticking and adds moisture to the base of the dish.

Arrange the seared chicken pieces over the marinara layer in a single, even layer. Try not to overlap them so they cook evenly and absorb all the flavors properly.

Spoon the yogurt-parmesan mixture over each piece of chicken, spreading it gently so every piece is well coated. This layer keeps the chicken juicy while adding a rich, creamy texture.

Pour the remaining marinara sauce over the top, spreading it lightly. Be careful not to add too much in one spot—just enough to coat everything without making the dish watery.

Sprinkle the shredded mozzarella cheese evenly over the entire dish, covering the surface so you get that perfect melted, golden, cheesy top once baked.

Place the baking dish in the preheated oven and bake for 25–30 minutes, or until the chicken is fully cooked through and the cheese is melted, bubbly, and slightly golden on top. If needed, you can broil for 2–3 minutes at the end for extra browning.

Remove the dish from the oven and let it rest for 5–10 minutes before serving. This step is important because it allows the juices to settle and keeps the chicken tender instead of dry.

Garnish with freshly chopped herbs like basil or parsley for a fresh finish, then serve warm and enjoy the rich, cheesy, high-protein goodness.